CAPCITOR PART 1 /36 Capacitor Test -1 class 12 th objective question 12 th board important physics question capacitor 1 / 36 Three condenser each of capacitance C are connected in series then the equivalent capacitance will be C 3C 1/3C C/3 2 / 36 Electrical capacity of spherical conductor of radius 9 km 2uF 1uF 1F 9F 3 / 36 Capacitance of parallel plate capacitor with medium of dielectric constant €r €°€rA / d €°. €r d / A A/ €° . €r.d None of these 4 / 36 Dimension formula of electric capacitance M^-1L^-2T^4A^3 M^1L^-2T^4A^2 ML^2T^4A^-2 M^3 L^-2T^4A^2 5 / 36 The electric potential at the surface of an atomic nucleus (Z=50) of radius 9×10^-15 9×10^5 9 8.85×10^-14 8× 10^6 6 / 36 If a dielectric is placed between two plates of parallel plate capacitor, the value of capacitance Decreases Increases Constant None of these 7 / 36 Which of the following is correct for potential difference W/q W×q Wq/2 q / W 8 / 36 Which one is correct for capacitance of parallel plate capacitor £° A/d £°d/A d/£°.A A/£°.d 9 / 36 A dielectric constant of 6 is to be filled in the gap between two plate of parallel plate capacitor. What is the factor by which the gap should be changed to maintain the same capacitance 2 Same gap 6 1/6 10 / 36 Electric potential at the center of charged hollow metal sphere is Zero Equal to the surface Double the surface value Half the surface value 11 / 36 Dielectric constant for vaccum is 1.23 Infinity 1 0 12 / 36 Dielectric strength of air is 3×10^7 3×10^6 3×10^-6 3×10^10 13 / 36 sum of charge on collecting and condensing plate of a charged capacitor is Zero 1uF 1C Infinite 14 / 36 The electro static energy of the system made by two electric dipole kept at a distance r is proportional to r^2 r^-3 r^4 None of these 15 / 36 Which of the following is correct for potential due to electric dipole V~r^2 V~r^-1 V~r^-2 V~r^-3 16 / 36 The capacitance of spherical capacitor is directly proportional to its Radius £° 1/£° None of these 17 / 36 The volt is equal to Coloumb/Farad Newton/meter Coloumb/ meter Joule/ coloumb 18 / 36 The relationship between electric field and electric potential is E=- ( dv/dr) E= -(dr/dv) E= v. r E=dr/dv 19 / 36 The value of electric potential due to a point charge at a distance r Kq/r Kq/r^2 q. r/k Kq. q/r^2 20 / 36 Electric capacitance of 🌎earth of radius R is π£°/R 4π£°R 4π£°/R qR/4π€° 21 / 36 Energy of a charged conductor is E=1/2 C v E = 1/2 Cv^2 E= Q^2 / 2C B and C 22 / 36 Two capacitor each of capacity C connected in parallel. The equivalent capacitance is 2C C C/2 1/2C 23 / 36 Due to introduction of dielectric between plate of parallel plate Capacitor the capacitance will Decreased Increased Constant None of these 24 / 36 1 volt is equal to 1 J 1 J/C 1C/J 1 JC 25 / 36 Two capacitor C1= 2uF & C2=4uF are connected in series and potential difference of 1200V is applied across it. The potential difference across 2uF is 200 600 1200 800 26 / 36 The equivalent capacitance between A&B is 9/20 9 20/9 1/9 27 / 36 The energy stored per unit volume between two plates of parallel plate capacitor will be 1/2 £° R 1/2 £° E 1/2 £° . E^2 2 π£° R 28 / 36 1 micro Farad is equal to 10^6 10^-6 3×10^10 10^12 29 / 36 1 Farad is equal CV C/V C/V^2 CV^2 30 / 36 The capacitance of any capacitor is C=qv C=q/v C=v/q C =Vq/2 31 / 36 Potential energy of a charge conductor is CV^2 1/2 CV^2 1/3 CV^2 1/4 CV 32 / 36 Energy Stored in a capacitor is QV /2 CV^2 /2 Q^2/2C All of above 33 / 36 Electrical capacity of spherical conductor is 4π£°/R 4π€°R R/4π£° R×£°/π 34 / 36 The dielectric constant of water is 1 60 80 30.4 35 / 36 The potential gradient is equal to dx/dv dx. dv dv/dx None of these 36 / 36 What is the angle between electric field and equipotential surface 0° 90° 0 to 90° 0 to 180 ° Your score is 0% Restart quiz
